Jeep Liberty KJ. Manual — part 67
*BRAKE INDICATOR INOPERATIVE
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
KJ
For a complete wiring diagram Refer to Section 8W.
Diagnostic Test
Possible Causes
BRAKE FLUID LEVEL SWITCH
PARK BRAKE SWITCH
(B25) PARK BRAKE SWITCH SENSE CIRCUIT OPEN
INSTRUMENT CLUSTER
1.
BRAKE FLUID LEVEL SWITCH
Is the BRAKE indicator only inoperative with the Park Brake engaged?
Yes
>> Go To 2
No
>> Replace the Brake Fluid Level Switch in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
2.
PARK BRAKE SWITCH
Disconnect the Park Brake Switch harness connector.
Connect a jumper wire between the Park Brake Switch Sense circuit and ground.
Turn the ignition on.
Observe the BRAKE indicator.
Did the BRAKE indicator illuminate?
Yes
>> Replace the Park Brake Switch in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
No
>> Go To 3
3.
(B25) PARK BRAKE SWITCH SENSE CIRCUIT OPEN
Turn the ignition off.
Disconnect the Park Brake Switch harness connector.
Disconnect the Instrument Cluster harness connector.
Measure the resistance of the (B25) Park Brake Switch Sense circuit.
Is the resistance above 5.0 ohms?
Yes
>> Repair the (B25) Park Brake Switch Sense circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Replace and configure the Instrument Cluster in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
KJ
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
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*FUEL GAUGE INACCURATE
For a complete wiring diagram Refer to Section 8W.
Possible Causes
FUEL LEVEL SENSOR DTC PRESENT
INTERMITTENT CONDITION
FUEL LEVEL SENSOR
INSTRUMENT CLUSTER
Diagnostic Test
1.
FUEL LEVEL SENSOR DTC PRESENT
NOTE: Diagnose and repair any PCM Fuel Level DTCs before proceeding with this test.
With the scan tool, read DTCs.
Does the scan tool display any Fuel Level Sensor DTCs?
Yes
>> Refer to symptom list for problems related to Fuel Level Sensor DTCs.
No
>> Go To 2
2.
INSTRUMENT CLUSTER
Perform the Instrument Cluster Self Test.
Depress and hold the Trip Odometer reset button while turning the ignition on.
NOTE: The Instrument Cluster Self Test can also be performed using the scan tool.
Observe the Fuel Gauge calibration points during the Self Test.
The Fuel Gauge indicator needle should pause at the following positions:
Off: Empty Stop below
9
E
9
Calibration Point 1:
9
1/4
9
Calibration Point 2:
9
1/2
9
Calibration Point 3:
9
F
9
Calibration Point 4:
9
3/4
9
Calibration Point 5:
9
1/2
9
Calibration Point 6:
9
1/4
9
Calibration Point 7:
9
E
9
Did the Fuel Gauge needle pause at the correct calibration points?
Yes
>> Go To 3
No
>> Replace and configure the Instrument Cluster in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
3.
FUEL LEVEL SENSOR
With the scan tool, select Body, MIC, then Monitors.
Read the Fuel Tank Level Volts.
Compare the Fuel Tank Level Volts displayed by the scan tool to the Fuel Gauge using the following values:
4.3 - 3.19 Volts (Approximately 220 - 200 Ohms of Fuel Sensor Resistance) =
9
E
9
2.56 Volts (Approximately 160 Ohms of Fuel Sensor Resistance) =
9
1/4
9
1.91 Volts (Approximately 120 Ohms of Fuel Sensor Resistance) =
9
1/2
9
1.27 Volts (Approximately 80 Ohms of Fuel Sensor Resistance) =
9
3/4
9
0.319 - .646 Volts (Approximately 20 - 40 Ohms of Fuel Sensor Resistance) =
9
F
9
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
KJ
NOTE: Fuel Tank Level Voltage should be within +/- 0.2 volts.
Is the displayed Fuel Tank Level voltage correct?
Yes
>> The condition is not present at this time. Monitor scan tool parameters while wiggling the related wire
harness. Refer to any Technical Service Bulletins (TSB) that may apply. Visually inspect the related wir-
ing harness and connector termianls.
No
>> Replace the Fuel Level Sensor in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
KJ
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
8J - 77
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